Those are so funny. I teach a high school Anatomy and Physiology class and every year we have a lesson on reading x-rays. One of the x-rays shows a hand with a nail through one of the fingers. The caption reads "16-year-old boy was playing with a nail gun." Every year one of the girls just blurts out aloud (and completely out of context for most of the class), "Of course it's a boy!" I sure wish I had a copy of the x-ray.

Sears Tower 127
Minolta SRT-101
Yashicamat 124G (belonged to the school but I used it a lot)
Calumet 4x5 view camera, can't remember which model
Canon TX
Pentax Spotmatic II (also belonged to school but used every day)
Canon FTbn
Canon F-1n (x3) which I still have and occasionally use
Sony something forgettable, it was digital andhad so much shutter lag that I hated it and did not keep it for long
Canon 20d
Canon G10
Canon 40d

Thank-you for planting milkweed!!! We get monarchs here in the Monterey Bay area but also far fewer than before. We really need to do something about climate change before we loose any more beautiful creatures.

I too do not think they look washed out. The burned parts of the trees have areas that a nearly devoid of detail as they reach maximum black. I think they show the light as it is mid-day and I like it. I can feel the bright light and feel the warmth in the air.

Sodium arc lamps are yellow and mercury vapor lamps are green. The cause is the way light is produced by the sodium and mercury atoms they contain. If it either of these there is little you can do about the color as the light they produce is nearly monochromatic. If it is an older fluorescent type bulb with lots of mercury in it then white balance could help but that would shift the colors in the areas of the scene not illuminated by the light. In this case it would shift the sky toward magenta.

I would say #2 is a landscape. To me the subject is the environment in which a mill is located; a part of the landscape.

I think you have a euphorbia, not a cactus.

The rule that the diameter of the physical lens element is equal to the focal length divided by the f-number is true for simple lenses consisting of a single element. For multi-element lenses the focal length divided by the f-number is the diameter of the entrance pupil of the lens. This is located at some distance behind the front element in this lens and has been reduced in size to 18 mm at the 80 mm focal length setting by the various additional elements in the lens. For symmetrical (Zeiss calls this a Planar design) and telephoto lenses this corresponds to the physical front element of the lens. For retrofocus lenses (Zeiss Distagon designation) the front element is larger in diameter than the entrance pupil. We see this in wide-angle lenses for SLRs. The 80-200 mm zoom is a telephoto at 200 mm and a retrofocus lens at 80 mm. You can see this if you look through the front element of the lens and zoom; there is circle that moves away from you and becomes smaller as you zoom from 200 mm to 80 mm, this circle is the entrance pupil and is the effective diameter of the lens.

Nice shot. It is a lichen and the yellow surfaces are the fruiting bodies producing spores.

Fall colors can be beautiful in black and white. I especially like numbers 2 and 4. Have you tried applying a yellow or orange filter to the conversion; it may give it a lot more pop. And yes, dogs can see some color. They can distinguish between blues and yellows but not greens and reds.

The physical dimensions of the sensor has no effect on exposure. Think of the APS-C as being just the center portion of a full frame sensor only cropped; it produces the same effect as if you printed an image form a full frame sensor and then trimmed it with a pair of scissors.

I don't shot Nikon so I can't recommend specific lenses but my favorite focal lengths would be 24, 35 and 85 mm. When I shot film I used these three lenses the most. For city and people I would want fast primes in those focal lengths. To that I might want to add a wide zoom for landscapes that won't fit in the angle of view of the 24 and maybe a 70-200/2.8 for those times when I want a little more reach.

I have always had a fondness for the IR end of the spectrum. Someday I will have to convert a camera.

Thanks for the pics.

Also know as sidecar files, these contain all of the edits you made to an image. Lightroom does not change anything in the original image file and instead keeps track of any edits you made in this file. Deleting them will, in essence, delete any edits you made to an image.

One of my favorites is André Kertész.
https://www.icp.org/exhibitions/andré-kertész